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Can a FIFO be generated to use the AXI stream protocol? Absolutely! Check out this FIFO: - S_AXIS_VALID can be fed to the write port, i_wr - S_AXIS_READY is the compliment of the FIFO full output, o_full - S_AXIS_DATA can be fed to the incoming data port, i_data - M_AXIS_VALID is the compliment of the FIFO empty output, o_emtpy - M_AXIS_READY can be fed directly to the read port, i_rd - M_AXIS_DATA can be read directly from the outgoing data port, o_data - If you want to support other AXI Stream signals, they can simply be concatenated with the data signals above.
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For example, my most recent ZipCPU DMA design will (eventually) handle 8b, 16b, 32b, or arbitrary transfer sizes for both reading or writing. This has forced me to place a shim both before and after the FIFO to make it work properly.
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